例如，如果您计划只使用servlet和jsp页面，并且需要让用户回到前一个页面，那么可以使用清单21中的代码。
For example, if you plan to use just servlets and JSP pages and you need to get your users back to the previous page, you can just use the code in Listing 21.
有报道说前一阵你回到曼彻斯特和一个球员签约了……
Midway through the tour it was reported you flew back to Manchester to sign a player…
最后看到了一个良好的开端前2名司机和很短的时间，他们已开辟了差距，回到第三点。
The final saw a good start for the front 2 drivers and within a short time they had opened a gap back to 3rd spot.
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